The traffic has worsened over the years, a trend D.O.T. officials expect to continue.

By 1860, the immense traffic over the road and lack of maintenance had worsened it to the point that it could no longer be used by stagecoaches.

As a result, traffic and pollution on the West Side worsened.

Increased traffic as well as increased road penetration of habitat have worsened the problem over the years.

Mr. Gross laments that "traffic has worsened" (where hasn't it?)

But neighbors of the Upper East Side site fear that under the new system, local traffic from sanitation trucks will worsen.

Having mastered the basic skills, you can increase the traffic, switch airports, worsen the weather, even make the pilots inattentive and careless.

During those years, traffic and accompanying air pollution steadily worsened, damaging many of the monuments the archaeologists were determined to protect.

Only as traffic has worsened in the metropolitan area have some of those appeals hit home, Colorado's city planners say.

Streets were widened, traffic lights installed, and yet traffic worsened.